Normal behavior for a chick?

[ChickN00b]

I have a baby chick that's getting up there in weeks (has their wattles and comb and everything) and today I noticed it opening and closing its beak repeatedly. Not a gasping for air type beak opening (meaning it wasn't opening its beak all wide) but like a chewing motion when it eats. Is this something to get worried about? I'm completely new to taking care and raising chickens so of course, any little thing is gonna have me freaking out

It still eats and drinks water like normal, isn't lazy at all cause it'll still run around like always. Just odd I guess that it looks like it's chewing

 

[ChickensAreSweet]

They adjust their crops- should look like yawning. Not all the time but occasionally.